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A smart, calculated action thriller that keeps the reader guessing.
— Den of Geek
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Trust us, trigonometry has never sounded so cool.
— Paste Magazine
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Fun and original.
— San Francisco Chronicle
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Fast, furious, and adds up to one of the coolest, most crackin’ reads this year.
— Chuck Wendig
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The best novel I've read this year; a heroine I fell in love with.
— Eric Van Lustbader, #1 New York Times bestselling author
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Cas Russell is who I want to be when I grow up. She kicks ass with her fists and her brain—a true twenty-first century action hero. I loved this book.
— Richard Kadrey
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Paced at a flat out sprint.
— Kate Elliott
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The smartest and thrillingest book you’ll read all year.
— Ken Liu
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Intense, vivid, and insanely clever, with a great heroine—I couldn't put it down.
— Yoon Ha Lee, New York Times bestselling author
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This hard-to-put-down, action-packed sf debut is intelligent and entertaining. With Cas, Huang has created an indelible, flawed character who makes mathematics seem almost magical.
— Library Journal, Starred Review
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A paranormal thriller in which both the action and the questions don't stop....Cas is an awesome antiheroine...exciting, nasty fun...an excellent harbinger for books to come.
— Kirkus